Door-check.



H; BALL. DOOR CHECK.

APPLICATION FILED JULY 25, 1910,'

LI39648 Patented July 14,1914.

Q l i l 6 l r/ 28 I f8 @muws ulllllllll I to apply to HARRY VBALI, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR T0 WORCESTER MANU- FACTURING' COMPANY, OF WORCESTER,

MASSACHUSETTS.

MASSACHUSETTS Al CORPORATION OE DoonvfcHEoK.

Specification of Letters Patent.

Patented July 14, 1914.

Application led July 25, 1910. Serial No. 573,672.

- ter,l in the county of Worcester and Com- Massachusetts, have invented Improvement 1nv Doormonwealth of a new and useful Checks, of which the following is a speci.

ication accompanied by drawings forming a part of the same.

My invention relates to that class of door checksy in which the tension of a spring is applied to a spindle from which' a radial arm extends suitably connected with a hinged door casing or other suit-able support for the purpose of closing the door when open, the movement of the spindle and arm being usually retarded by ,forcing a body of air or liquid through a restricted passage.

The construction and operation oy this class of door checks will be well understood as the same are in common use. 'j

The objects of my present invention are the above class of door checks a latching mechanism by which the movement of the radial arm may be interrupted at any desired point tially or wide open against the tension or the spring, and also to provide means for relieving the door from the tension of the spring when the door is fully closed to enable an electric door opener, o f the kind now in general use, to be employed with doors which are closedby spring actuated door` checks, and further to enable the operator to conveniently render the latching mechanism operative or inoperative at will and also to enable the stops to be convenientlv adjusted by the operator and I accomplish these objects by the construction and. arrangement of parts as hereinafter described and illustrated in the-accompanying drawings, in which- Figure 1 represents a side view of a door check embodying my improvements. Fig. 2

is a top view Aof the same. Fig. 3 represents the under side of the radial arm, partlyv m Section to disclose the spring actuated latch ing bolt. Fig. 4 is a detailed sectional view of a portion of the case, showing the spring actuated locking,i bolt for adjusting the latching mechanlsm, and Fig. 5 is a central sectional View of the upper portion of the and the' door held either par.

sert a spiral spring 11.

case and the adjustable disks thereon which are engaged by the latching bolt.v Similar reference characters refer to similar parts in the different figures. Referring to the accompanying drawings, 1 denotes a casing having flanges 2, 2 b'v which the casing is attached fto a door. 1nclosed within the casing 1 is a coiled spring l and the usual air o-r {iuid retarding mechanism, which need not be herein described as 1t is in common use. The coiled spring is applied to rotate a spindle 3 in the act of closing the door, and attached to the spindle 3 1s a radial arm 4 having the usual connection with the door casing or other suitable support, so that the swinging of the arm 4, as'the spindle 3 is rotated by the tension of the coiled spring 1, serves to close the door with a retarded movement. Upon the under side of the radial arm 4l is a spring actuated bolt 5, sliding in ways formed on the under side of the radial arm 4 and held in place by a pin 6 which enters a slot 7 in the bolt 5. The bolt 5 is provided with a shoulder 8, between which and the annular rim' 9 of a sliding block 10 I in- The block 10 is capable of sliding in the same ways as the bolt 5 and is provided with a concentric chamber 12 which receives the smaller end 13 of the bolt. The outer or exposed end of f the block 10 projects beyo-nd the recess to be acted upon by the cam shaped end 14 of a leverl 15 pivoted at 16 upon the under side of the radial arm 4. j In the position of the lever 15,'as shown in Fig. 3, the block 10 lies loosely in the recess and the spring 11 is relieved entirely of tension, thereby rendering the sliding bolt 5 inoperative. When the lever 15 is turned parallel with the radial arm 4, the cam shaped end 14 bears against the block 10, and compresses the spiral spring 11 so its tension will be exerted against the shoulder v8 of thebolt 5.

Mounted upon the casing 1 is a cover 17, having a downwardly extended flange 18 provided with a series lower edge to receive a locking bolt 20, which is forced into one of the notches 19 by a of notches 19 1n its the case 1 which enables the bolt to be depressed by the operator and withdrawn from engagement with the notches 19, thereby releasing the cover 17 and allowing-it to be adjusted on the case 1.

Mounted upon the cover 17 is a disk 23 which is adjustably held by means of a pin 24 entering one of a series of holes 25 and a hole 2G formed in the cover. The disk 23 is provided at its periphery with a notch 27 adapted to'be engaged by the end of the bolt 5 whenever the radial arm 4 in open' ing the door is brought into proper p0- sition to bring the bolt 5 into alinement with the notch 27. The notch 27 affords sulicient frictional resistance to the bolt 5 to check the action of the actuating spring by which the spindle 3 is rotated and hold the door in any given position according to the position of the notch 27.

On the periphery of the flange 18 is a shoulder 28 and the end of the bolt 5 is downwardly extended, to' form a lip 29, Fig. 1, adapted to engage the shoulder 28. The frictional resistance offered by the shoulder 28 to the end of the bolt 5 is sutiicient to counteract the tension of theI actuating spring connected with the rotating spindle 3. In operation the shoulder 28 is designed to relieve the door from the tension ofthe spring just before the free edge of the door is completely closed, usually wit-hin about one eighth of an inch of the complete closure ofthe door, the momentum of the door being depended upon to move the door through the remaining one eighth of an inch; or to bring the free edge of the door against the door jamb for the purpose of enabling the door check to be employed in connection with the pivoted retaining latch of an electrical door opener, such as is in general use in apartment houses and other places where the locking mechanism of the door is to be released from a distance.

In applying the door check the shoulder 28 is placed in proper position to be engaged by the bolt 5 when the free edge of the door is within about one eighth of an inch of being closed, while the notch 27 is placed in proper position by the adjustment of the disk 23 to hold the door open at any desired distance. If the door check is not used upon a door having what is known as an electricalv door opener, the shoulder 28 may be adjusted in proper position to hold the door open a few inches by withdrawing the locking bolt 20 and turning the cover 17 to cause the locking bolt 20 to engage another of the notches 19, and the disk 23 may then be readj usted to hold the door still, further o en.

pThe use of the notch 27 and the shoulder 28`for holding the door Vopen at diierent degrees enables the door to beheld wide o en for free passage, or to stand ajar a ew check, but such aware, are more or less ditticult of access and` 'casing by the sliding inches for the purpose of ventilation. Whenever the door is held by the engagement of the bolt 5 with either the. notch 27 or shoulder 28, it may be readily released by a slight pressure upon the free edge of the door, when the tension of the actuating spring connected with the oscillating spindle B'will be' permitted to close the door. `When desi red, the notch 2T may be placed in position to be engaged by the bolt 5 when the door is in its extreme open position, allowing theI I am aware that it is not new to restrain the swinging movement of the ,radial arm 4 by means of a yielding latching mechanism between the arm and the casing of the door devices, so far as I am adjustment. Door checks of the class described are employed in situations where it is desirable that the positions in which the door is held open by the latching mechanism should be varied from time to time, and it is one of the objects of my present invention to enable this to be conveniently accomplished by the operator. This is done by engaging one of the stops on the cover of the bolt 5, depressing the bolt 20 by means o the stud 22 until the flanged cover is released, and then swinging the door and cover to a desired position and allowing the latter to be rengaged by the spring actuated bolt 20. It frequently occurs that it is desirable to entirely relieve the door of its latching mechanism, allowing the door to be always automatically closed when opened to any extent. This is accomplished by my improvement by simply rotating the camon the under side of the radial arm, thereby relieving the tension of the spiral spring 1 1.v In a door check, a casing, a cover ad-v justably attached to said casing and pro-V vided with a stop on its periphery, a radial arm adapted to be connected with a door casing, a, bolt sliding in ways on the under side of and parallel with said radial arm, a spring appliedv to force said bolt against the perip ery of said cover, and means for releasing said bolt from the tension of said spring. v

2. In adoor check of the class described, a casing, a cover adjustably attached to said casing and having a shoulder on its periphery, a radial arm adapted to be connected with a door casing, a radially sliding bolt held on the under side of said arm, a slidable block, a spring interposed between said bolt and said block, `and a cam bearing against said block to force it against Said spring.

3. In a door check of the class described, a spring actuated swinging arm adapted to be connected with a door casing, a stop adjustably held by the casing ofthe door check, a bolt slidable in ways on the under side of said swinging arm, a spring bearing against said bolt to force it endwise, and a rotatable cani arranged to compress said spring.

4. In a door check of the class described, a casing, a flanged cover for said casing provided with a series of notches on the lower edge of its flange, a vertically slidable bolt held by said casing, a spiral spring a plied to said bolt to force it into one o said notches, a stud projecting from the side of said bolt, a swinging radial spring actuated arm, and a locking mechanism between said arm and said cover.

5. In a door check of the class described, a casing, a radial sprin actuated swinging arm, a pair of stops in ependently adjustable on said casing in different horizontal planes, a slidable bolt held on the under side of said arm in the plane of one of said stops, and a spring for forcing said bolt toward the casing, said bolt having a lipy HARRY BALL.

Witnesses PENELOPE COMBERBACH, NELLIE WHALEN. 

